Concrete wall form with adjustable bulkhead

ABSTRACT

A concrete wall form having an adjustable bulkhead in which a variety of bulkhead components cooperate with one another in sealing relationship to exclude the passage of concrete past any reinforcing rods, water seals, conduits or other residual concrete-embedded members which traverse or bridge the interfacial surfaces between adjacent concrete pourings.

United States Patent [151 3,693,928 Shoemaker [451 Sept. 26, 1972CONCRETE WALL FORM WETH 3,567,171 3/ 1971 Slominske ..249/9 ADJUSTABLEBULKHEAD 1,350,603 8/1920 Gerritson ..249/97 X 3,454,255 7/1969 Arquilla..249/33 [72] Hampshire 2,772,468 12/1956 Heltzel ..249/9 x [73]Assignee: Synions Corporation, Des Plaines, imary Examine -.l. Spenceroverholser lll. Assistant ExaminerBen D. Tobor [22] Filed: Nov. 4, 1970Att0rneyNorman H. Gerlach Appl. No.: 86,729

us. on. ..249/1s, 249/9, 249/30, 249/97 1111. CL; ..E04g 11/38 Field ofSearch ..249/9, 20, 21, 30, 1s, 33, 249/95, 97, 101, 194, 210; 25/1181-1, 118 w References Cited UNITED STATES PATENTS iel l [5 7] ABSTRACT Aconcrete wall form having an adjustable bulkhead in which a variety ofbulkhead components cooperate with one another in sealing relationshipto exclude the passage of concrete past any reinforcing rods, waterseals, conduits or other residual concrete-embedded members whichtraverse or bridge the interfacial surfaces between adjacent concretepourings.

6 Claims, 8 Drawing Figures 9 'IIII IIIIIIIIIII PATENTEDsms I972 SHEET 1BF 4 //v VE/V TOR: JAMES a SHOEMAKER Airy.

PATENTED I97? 3. 693, 928

sum u 0F 4 //V VE N TOR.

JAMES Q SHOEMAKER Affy.

CONCRETE WALL FORM WITH ADJUSTABLE BULKHEAD The present inventionrelates to an adjustable bulkhead of the type which is installed acrossthe space between the opposed but spaced apart sides of a conventionalconcrete wall or slab form and serves to retain on one side thereof thepoured wet concrete during the interim between successive concretepouring operations.

In concrete construction work where, in connection with use of anextremely long concrete wall form or an expansive slab form, it isnecessary to terminate a given concrete pouring operation for any reasonwhatsoever, as, for example, until a subsequent batch of concrete can beprepared, it is customary to erect a concrete barrier or bulkhead acrossthe form in order to hold the poured concrete while the same becomes setor hardened and produces an individual finished wall or slab section.When a subsequent concrete pouring is resorted to in the space betweenthe sides of the form, the bulkhead is dismantled and removed from itsposition between the two opposed form sides and the next pouringoperation is performed alongside the first and hardened. concretesection in order to produce a second concrete section which is acontinuation of the first poured and hardened section. Progressiveerection of a wall or slab in this manner is frequently resorted to,especially when a given wall or slab form is of great length or area.

Heretofore, especially where such items as reinforcing rods, waterseals, conduits or the like must bridge the interfacial seam betweenadjacent concrete sections, i.e., extend from one section across theseam and project into the next adjacent section, considerable difficultyhas been encountered in effecting a concrete seal for such items, itbeing necessary to prevent concrete seepage past the bulkhead since suchseepage, if allowed to remain on the end face of a given concretesection, will render the seam or joint between adjacent sections notwatertight even though the second poured concrete batch will envelopsuch seepage. This is particularly important in the construction of suchwalls or slabs as those which are employed in connection with swimmingpools, concrete dams, airplane runways, and the like. Such difficultyhas arisen largely because it is invariably the practice to erect abulkhead in piecemeal fashion, cutting lumber and fitting it in placearound the various reinforcing rods, water seals and other such bridgingitems. Furthermore, the cost of such piecemeal erection of a bulkhead isextremely high, a recently erected bulkhead for a 4-foot wide concretewall form 25 feet in height having entailed a cost of approximately 225dollars in labor and materials. Still further, a bulkhead which iserected in empirical fashion as described above is seldom reusablealthough some of the lumber which is employed may be salvaged and re-cutto serve in a subsequent bulkhead installation. In any event, laborcosts remain high.

The present invention is designed to overcome the above-notedlimitations that are attendant upon the piecemeal erection of a concretewall or slab form bulkhead of the character under consideration and,toward this end, the invention contemplates the provision of a varietyof prefabricated bulkhead components which may be constructed at thefactory and assembled in the field to accommodate such exigencies as mayarise, usually without requiring any special carpentry work or otheron-the-job operations such as the installation of concrete seals or thelike, the only operations required being the fitting of parts orcomponents together after a proper selection of such components has beenmade. Insofar as concrete sealing operations are concerned, according tothe present invention such components of the bulkhead assembly as are tobe fitted together in contiguous relationship are provided with matingor counterpart sealing strips which are formed of a resilientelastomeric material and mate throughout their entire length incoextensive fashion. Thus, any bridging item such as a reinforcing rod,a waterseal, a conduit or the like, regardless of its height in theconcrete wall or slab form, will automatically become sealed at thepoint where it passes between the two adjacent bulkhead components, themating seals which are associated with such components being displacedat their region of contact with the reinforcing rod or other bridgingitem in order to allow the same to pass through the bulkhead in sealingrelationship with respect thereto. After the bulkhead has served itspurpose and the poured concrete on one side thereof has become set orhardened, the entire bulkhead assembly may be dismantled and removedfrom the form for subsequent reuse of the components thereof in the sameor in a different concrete form installation.

The provision of a bulkhead assembly such as has been briefly outlinedabove and possessing the stated advantages constitutes the principalobject of the present invention.

Numerous other objects and advantages of the invention, not at this timeenumerated, will readily suggest themselves as the nature of theinvention is better understood from a consideration of the followingdetailed description.

The invention consists in the several novel features which arehereinafter described and are more particularly defined by the claims atthe conclusion hereof.

In the accompanying four sheets of drawings forming a part of thisspecification, the invention is shown as being applied to both aconcrete wall form and a concrete slab form.

IN THESE DRAWINGS FIG. 1 is a fragmentary perspective view, partly insection, of a portion of a concrete wall form, showing an exemplary formof bulkhead embodying the present invention operatively installedtherein;

FIG. 2 is a horizontal sectional view taken substantially on thehorizontal plane indicated by the line 2-2 of FIG. 1 and in thedirection of the arrows;

FIG. 3 is a fragmentary perspective view of one of the components of theparticular bulkhead assembly of FIGS. 1 and 2;

FIG. 4 is a fragmentary perspective view of another bulkhead component;

FIG. 5 is a fragmentary perspective view of a third bulkhead component;

FIG. 6 is a horizontal sectional view similar to FIG. 2 but showing thebulkhead removed from the concrete wall form after an initial concretepouring operation and hardening of the poured concrete;

FIG. 7 is a fragmentary perspective view of a concrete slab form andillustrating the application thereto of a bulkhead embodying the presentinvention; and

FIG. 8 is a vertical transverse sectional view taken substantially onthe vertical plane indicated by the line 88 of FIG. 7.

Referring now to the drawings in detail and in particular to FIGS. 1 and2, a concrete wall form to which an exemplary form of bulkhead isappliedis designated in its entirety by the reference numeral 10, the bulkheadas a whole being indicated at 12. The wall form 10 is purelyconventional in its construction and no claim is made herein to anynovelty therein, the invention residing rather in the details of thebulkhead which will be described in detail presently.

The concrete wall form 10, is made up of two upstanding, spaced apartsides 14 and 16, each side being comprised of a series of verticallydisposed wall form panels 18 which are disposed in edge-to-edgerelationship. The two form sides are supported on a suitable foundationwhich may be the ground, a prepared deck or other pouring surface. Thepanels which have been selected for illustration herein are of theSteel-Ply type such as are manufactured and sold by Symons Corporationof Des Plaines, Illinois, and each panel is comprised of a plywoodfacing 20 which is surrounded by a rectangular marginal steelreinforcing frame 22..

Although only the vertical frame members are shown herein, it willbeunderstood that the frame of each panel 18 includes top and bottomframe members which extend horizontally between the vertical framemembers in order to complete the marginal studding type frame for thepanel. The adjacent panels 18 are connected together by conventionalfastening devices (concrete hardware) in the form of T-bolt and wedge 1assemblies 24, the bolts of the assemblies passing through alignedslots.26 in the various members of the frames 22, and the wedgesextending through slots in the shanks of the bolts and serving to drawthe adjacent panels hard against each other in edge-to-edgerelationship. Horizontally and transversely extending tie rods 28 havetheir opposite ends attached to the juncture regions between the framemembers of the reinforcing frames of adjacent panels by means of theT-bolt and wedge assemblies 24, extend across the space between thesides 14 and 16 of the form 10, and serve to maintain the said formsides in their proper spaced apart relationship.

it will beunderstood, of course, that it is intended that wet concretewill be poured between the two form sides 14 and 16 in order to producea concrete wall. It will also be understood thatthe concrete wall form10 is of such length that a single batch pouring of the wet concretewill not sufi'ice to produce the entire wall, and hence, it is necessaryto resort to successive concrete pouring operations, one such operationtaking place on the right-hand side of the bulkhead 12 as viewed in FIG.2, and a subsequent pouring operation taking place on the left-hand sideof the hardened concrete wall section W (see FIG. 6) resulting from theinitial concrete pouring operations and after the bulkhead 12 has beendismantled and removed from the concrete wall form 10. v

Considering now the nature of the bulkhead l2,this bulkhead projectscompletely across the space between the two sides 14 andl6 of theconcrete wall form 10 and is made up of prefabricated components which,for exemplary purposes herein, are selected from a stock of suchcomponents and serve to accommodate the placement within the concretewall form 10 of a conventional reinforcing mat 30 and a conventionalplastic water seal 32. The reinforcing mat 30 is comprised of arectangular checkerboard arrangement of vertical reinforcing rods 34 andhorizontal reinforcing rods 36, the various rods being welded togetherat their crossover points as indicated at 38. The particular type ofreinforcing rods 34 and 36 which are illustrated herein are known asHavermeyer bars and are manufactured by Concrete Steel Co. of New York,N. Y. However, other forms of reinforcing bars and the mats which areconstructed therefrom are widely used in the concrete industry forconcrete reinforcing purposes within a concrete wall form. Among suchbars are Diamond bars as manufactured by Concrete Steel Engineering Co.of New York, N. Y. and ribbed bars as manufactured by Trussed ConcreteSteel Co. of Youngstown, Ohio. Irrespective, however, of the particularform of reinforcing bars which are used for mat forming purposes, themat 30 is readily susceptible to the sealing function of the hereindescribed bulkhead in a manner that will be made clear presently. TheHavermeyer bars which are illustrated herein are of elongated steel rodstock and the outer surfaces thereof are provided with a multiplicity ofsmall generally elliptical outwardly extending protuberances 40.-Diamond bars are formed with similar protuberances but of diamondshape, while the ribbed bars are provided with small circumferentiallyarranged thin ribs on the outer surfaces thereof.

The illustrated water seal 32 is likewise purely conventional and issold by various manufacturers too numerous to mention. The illustratedwater seal is formed of extruded plastic material and presents a flatbody portion 42 from which there project laterally in oppositedirections a horizontal series of transversely extending ribs 44. Thewater seal material is sold in sheets and may be cut to any desiredconfiguration, the present seal being in the form of an elongated stripof full bulkhead height and of a width on the order of ten or twelveinches.

The bulkhead which is illustrated herein for exemplary purposes iscomprised of three principal components, each of which is in the for ofan assembly of parts. These three components consist of a pair of sidecomponents 50 and 52 which are positioned adjacent to the form sides 14and 16 and abut against the plywood facings 20, and a medial or centralcomponent 54 which is interposed between the two side components inedge-to-edge relationship. The components 50 and 54 of the bulkhead l2cooperate with each other to accommodate passage through the bulkhead ofthe various horizontal reinforcing bars 36 of the reinforcing mat 30,while the components 52 and 54 of the bulkhead cooperate with each otherto accommodate projection of the water seal 32 from the right-hand sideof the bulkhead as viewed in H6. 2. The components 52 and 54 also servethe purpose of providing or forming the left-hand end face of the firstpoured concrete wall section W (see FIG. 6) a vertical keyway 110 whichis designed for interlocking with the second poured concrete wallsection which is to be poured against said left-hand end face of thefirst wall section as previously described.

Considering now the side bulkhead component 50, this component comprisesa bean 56 in the form of a length of 4 inches X 4 inches lumber (seeFIG. 3) to which there is applied by nailing as indicated at 58 a steelchannel member 60, the web portion 62 of the channel member lying incoextensive face-to-face contact with one side of the beam 54 and theside flanges 64 of the channel member closely hugging the adjacentopposite sides of said beam. The web portion 62 of the channel member 60has applied thereto by a suitable adhesive an elongated sealing strip 66which is formed of resilient sealing material and is of symmetricaltrapezoidal configuration in transverse cross section, the large base ofthe strip being adhered to the web portion 62 of the channel member 60.Various materials may be employed in manufacturing the sealing strip 66,one

,such material being a Neoprene foam elastomer which possesses such ahigh degree of resiliency and restorative properties as to enable it tobecome restored to its original shape after it has been deformed and thedeforming pressure released. Various adhesives are suitable for bondingthe sealing strip 66 to the web portion 62 of the channel member 60, onesuch adhesive being Pliobond" which is manufactured and sold by GoodyearTire and Rubber Company of Akron, Ohio. The bulkhead component 50 ispositioned at the desired location within the concrete wall form 10 withthe uncovered side of the beam 56 lying flush against the plywood panelfacing of the adjacent wall form panel 18 which is associated with andforms a part of the wall form side 16.

The central bulkhead component 54 is comprised of a beam 70 (see FIG. 4)in the form of a length of 4 inches X 8 inches lumber to the oppositeedges of which there is applied a pair of steel channel members 72 and74 which are secured in position by nails 76. A sealing strip 78 whichis formed of Neoprene foam elastomer and is identical to the sealingstrip 66 is adhered to the channel member 72 of the central bulkheadcomponent 54, while a sealing strip 80 is adhered to the channel member74 of said component. The sealing strip 80 is formed of Neoprene foamelastomer and is provided with a rectangular body portion 82 from whichthere projects laterally a side flange 84, the latter being ofnon-symmetrical trapezoidal shape in transverse cross section. The bodyportion 82 is ad hered to the web portion of the channel member 74 whilethe side flange 84 is adhered to one of the side flanges of said channelmember 74.

The bulkhead component 52 is comprised of a beam 90 (see FIG. 5) towhich there is applied a single steel channel member 92 which is securedin position by nails 94, the web portion of the channel member 92 lyingflush with one side edge of the beam 90 and the flanges of said channelmember straddling the front and back faces of said beam. A sealing strip96 which is identical to the sealing strip 80 is applied to the channelmember 92. The bulkhead component 52 is disposed at the desiredlongitudinal location within the concrete wall form 10 with theuncovered edge of the beam 90 lying flush against the plywood panelfacing 20 of the adjacent wall form panel 18 which is associated withthe wall form side 14.

As clearly shown in FIG. 2, the two bulkhead components 50 and 54 aredisposed in transverse alignment with the two elongated sealing strips66 and 78 in contiguity and coextensive sealing relationship, thevarious horizontal reinforcing rods 36 of the reinforcing mat 30 passingbetween these two strips and displacing the material of the strips atthe region of entry of the rods therebetween. The strips thus closelyhug the rods 36 and effect the desired concrete seal. Similarly, the twobulkhead components 52 and 54 are disposed in transverse alignment withthe two elongated sealing strips 80 and 96 in contiguity and coextensivesealing relationship and in straddling relationship with respect to thewater seal strip 32 which they serve to support. The opposed faces ofthe two strips 80 and 96 are displaced by the water seal strip 32 withthe ribs 44 of the latter penetrating deep into the material of thesealing strips so that these latter strips afford the desired concreteseal. The side flanges of the strips 80 and 96 cooperate with each otherto provide a keyway pattern in a manner that will be set forthsubsequently. Approximately one-half of the water seal 32 projectsoutwardly from the two sealing strips 80 and 96 for embedment in theconcrete which is to be poured between the forms during the firstconcrete pouring operation as previously described.

The bulkhead i2 is erected within the concrete wall form 10 bypositioning the three components in their proper transverse alignmentand securing the components 50 and 52 in position against the plywoodfacings 20 by nails 98. The water seal 32 is placed in position betweenthe sealing strips 80 and 96 at the time the two components 54 and 52are initially brought into contiguity.

In order to lend support to the three assembled bulkhead components 50,52 and 54, there is provided appropriate backing lumber such as a seriesof horizontal backboards 100 which bear against the components 50, 52and 54. Vertical backboards 102 for reinforcing the backboards 100 may,if desired, be secured by nails 104 in position against the inside facesof the plywood facings 20.

As previously stated, after the bulkhead 12 has been erected in themanner previously set forth and the concrete poured in the portion ofthe concrete wall form 10 to the right of the bulkhead as viewed in FIG.2, and the concrete has become hardened to produce the first wallsection W (see FIG. 6), the bulkhead consisting of the three components50, 52, and 54, as well as the backing lumber I00 and 102, is removed,thus producing the concrete structure which is shown in FIG. 6 andwherein the various horizontal reinforcing rods 36 of the reinforcingmat 30 project outwardly from the concrete wall section W and continuealong the unpoured portion of the form. Similarly, the voids which areestablished by withdrawal of the mating side flanges of the sealingstrips 80 and 96 from the concrete of the concrete wall section Westablish the aforementioned keyway lit) in said wall section. Throughsuch keyway projects the portion of the water seal 32 which formerly wasembedded, so to speak, between the two sealing strips 80 and 96.Subsequent pouring of wet concrete to producethe next adjacent concretewall section (not shown) causes the protruding portions of the rods36and the protruding portion of the water seal 32 to become embedded inthe concrete of such pouring.

It is to be distinctly understood that the concrete wall form bulkhead12 which is illustrated and described herein is merely an exemplary formof bulkhead which embodies the principles of the present invention.Depending on the width of the concrete wall form to which the bulkheadis to be applied, additional bulkhead components, variously fashioned tosuit the exigencies of the situation, may be employed either forcoextensive sealing therebetween or for sealing against various articlesof concrete hardware. For example, under certain circumstances, it maybe desired to provide two keyways, two reinforcing mats, or two water.

seals within the concrete wall form. In such an instance,

component duplication may be resorted to. Similarly,

under certain circumstances, it may be found desirable to utilize a pairof bulkhead components suchas the components 52 and 54 to provide .onlya keyway such as the keyway 110, but the water seal 32 omitted. In suchan instance, the contactingfaces of the two sealing strips 80 and 96will establish the necessary concrete seal in the absenceof the waterseal 32. It will be understood, of, course that all of the bulkheadcomponents 50, 52, and 54 are of full concrete from height.

The bulkhead components 50, 52 and 54 are, with modification only as faras size is concerned, capable of use in connection with a concrete'slabform installation such as in illustrated in FIGS. 7 and 8. Where a largearea slab is being formed by successive concrete pourings, it isnecessary to erect a bulkhead to hold the concrete of each pouring untilwork on the next successive pouring has commenced, just as it is inconnection with the previously described wall form bulkhead and for thesame reasons. In forming a relatively thin slab, for example, a slabhaving a thickness of one foot or so, if only a keyway between slabs isrequired, a pair of components, each of which is similar to thepreviously described component 54, may be employed and the water seal 32may be omitted so that the two sealing strips make coextensiveface-to-face I ployed.

ln forming a relatively thick slab, it may be found desirable to employa bulkhead which contains all of the components which are associatedwith the previously described wall form bulkhead 12, in which case thecompleted slab will have a keyway, a water seal, and a reinforcing mat.A slab of this type is commonly used in connection with airplane landingfields where it is not uncommon for the concrete runways to have athickness of 4 or even 5 feet.-Such a slab may be poured upon theground, or when there is to be underground facilities, portions of sucha slab may be poured on a prepared deck. Such a slab, in the process ofundergoing formation, is illustrated in FIGS. 7 and 8, one of thebulkheads which is associated therewith being designated in its entiretyby the reference nucontact throughout their entire length and width. If,in addition meral 310. The components of the bulkhead 310 are similar tothe components which are employed in connection with the bulkhead l2and, therefore, in order to avoid needless repetition of description,similar reference numerals but of a higher order have been applied tothe corresponding parts as between the disclosures of FIGS. 7 and 8 onthe one hand, and FIGS. 1 and 2 on the other.

The deck 320 is supported on horizontal stringers or beams 321 and thebulkhead 310 is supported on the deck and is reinforced by verticalbackboards 400 and triangular bearing blocks 402. Thereinforcing mat 330is maintained in its proper spaced relationship above the deck 320 byconventional sheet metal chairs 401. In view of the foregoingdescription of the bulkhead 12, it is believed that the disclosure ofFIGS. 7 and 8 will be obvious. It is to be observed that the bulkheadcomponents 350-and 354 accommodate the position of the reinforcing mat330 while the components 352 and 354 accommodate both a keyway 410 inthe hardened slab section S as well as a water seal 332. It will beunderstood that all of the bulkhead components are of full concrete formwidth.

It is, of course, necessary that in order to attain the desired sealingeffect between the mating elastomeric sealing strips 366 and 378, and382 and 396, the bulkhead 310 be placed under compression in a verticaldirection. In the case of the bulkhead l2, horizontal compression of thebulkhead components is attained by causing them to be wedged, so tospeak, between the wall form sides. In the bulkhead 310 bulkheadcompression in a vertical'direction is attained by the use of verticalbolt and nut assemblies 323 which not only hold the components undersuch vertical compression butalso serve to anchor the bulkhead 310 tothe deck 320. The backboards 400 are secured by nails 324 to the woodenbeams 356, 370 and 390 of the components 350, 354 and 352, respectively,while the triangular bearing blocks 402 are secured by nails 325 to thebackboards 400.

The invention is not to be limited to the exact arrangement of partsshown in the accompanying drawings or described in this specification asvarious changes in the details of construction may be resorted towithout departing from the scope of the invention as defined in thefollowing claims.

Having thus described the invention what I claim as new and desire tosecure by letters patent is:

l. he concrete form including a horizontal pouring deck, a pair ofupstanding opposed form sides and a horizontal reinforcing rod disposedbetween said sides and extending longitudinally of the form, a bulkheadmounted on said deck, bridging the distance between said form sides, andadapted for interim end sealing during the interval between successiveconcrete pouring operations, said bulkhead comprising a plurality ofbulkhead components disposed inedge-to-edge relationship, each componentbeing in the form of an elongated wooden beam, the opposed edges of onepair of adjacent beams being reinforced by coextensive steel memberswhich are fixed thereto, said members having effectively andcoextensively adhered thereto a pair of resilient elastomeric sealingstrips which make coextensive sealing contact with each other and thusdefine an interfacial sealing area therebetween, said reinforcing rodprojecting through said sealing area and displacing the elastomericmaterial of the strips so that the latter closely hug the rod in sealingrelationship.

2. In a concrete form, the combination set forth in claim 1 and whereinthe steel members are provided with web-like portions, and the sealingstrips are adhered to said web-like portions by an 3. In a concreteform, the combination set forth in claim 4 and wherein the sealingstrips are of symmetrical trapezoidal configuration in transverse crosssection with the large bases of the strips adhered to the web portionsof the steel members and the small bases thereof disposed in abuttingsealing relationship.

4. In a concrete form, the combination set forth in claim 1 and whereinthe opposed edge regions of a second pair of adjacent beams likewisehave effectively and coextensively adhered thereto a pair of resilientelastomeric sealing strips which make coextensive sealing contact witheach other and thus define a second interfacial sealing areatherebetween, the combination further including a Hat sheet-like waterseal projecting into said second interfacial sealing area andeffectively retained in position by the pressure of the sealing stripsof said second pair of adjacent sealing strips on opposite sidesthereof, and said water seal being of full concrete pouring height andhaving a portion thereof projecting outwardly from said sealing area forembedment in a first concrete pour.

5. In a concrete form, the combination set forth in claim 2 and whereinthe opposed edge regions of a second pair of adjacent beams likewisehave effectively and coextensively adhered thereto a pair of resilientelastomeric sealing strips which make coextensive sealing contact witheach other and thus define a second in terfacial sealing areatherebetween, said latter pair of sealing strips having portions thereofprojecting laterally beyond the confines of the associated beams and, incombination with each other, defining a keyway-forming pattern by meansof which successive concrete pourings are keyed to each other, thecombination further including a flat sheet-like water seal projectinginto said second interfacial sealing area and effectively retained inposition by the pressure of the sealing strips of said second pair ofadjacent sealing strips on opposite sides thereof, said water sealhaving a portion thereof projecting outwardly from said sealing area forembedment in a first concrete pour.

6. In a concrete form, the combination set forth in claim 2 and whereinsaid steel members are in the form of structural channels having sideflanges which straddle the opposed edges of the adjacent beams.

1. In a concrete form including a horizontal pouring deck, a pair ofupstanding opposed form sides and a horizontal reinforcing rod disposedbetween said sides and extending longitudinally of the form, a bulkheadmounted on said deck, bridging the distance between said form sides, andadapted for interim end sealing during the interval between successiveconcrete pouring operations, said bulkhead comprising a plurality ofbulkhead components disposed in edge-to-edge relationship, eachcomponent being in the form of an elongated wooden beam, the opposededges of one pair of adjacent beams being reinforced by coextensivesteel members which are fixed thereto, said members having effectivelyand coextensively adhered thereto a pair of resilient elastomericsealing strips which make coextensive sealing contact with each otherand thus define an interfacial sealing area therebetween, saidreinforcing rod projecting through said sealing area and displacing theelastomeric material of the strips so that the latter closely hug therod in sealing relationship.
 2. In a concrete form, the combination setforth in claim 1 and wherein the steel members are provided withweb-like portions, and the seAling strips are adhered to said web-likeportions by an
 3. In a concrete form, the combination set forth in claim4 and wherein the sealing strips are of symmetrical trapezoidalconfiguration in transverse cross section with the large bases of thestrips adhered to the web portions of the steel members and the smallbases thereof disposed in abutting sealing relationship.
 4. In aconcrete form, the combination set forth in claim 1 and wherein theopposed edge regions of a second pair of adjacent beams likewise haveeffectively and coextensively adhered thereto a pair of resilientelastomeric sealing strips which make coextensive sealing contact witheach other and thus define a second interfacial sealing areatherebetween, the combination further including a flat sheet-like waterseal projecting into said second interfacial sealing area andeffectively retained in position by the pressure of the sealing stripsof said second pair of adjacent sealing strips on opposite sidesthereof, and said water seal being of full concrete pouring height andhaving a portion thereof projecting outwardly from said sealing area forembedment in a first concrete pour.
 5. In a concrete form, thecombination set forth in claim 2 and wherein the opposed edge regions ofa second pair of adjacent beams likewise have effectively andcoextensively adhered thereto a pair of resilient elastomeric sealingstrips which make coextensive sealing contact with each other and thusdefine a second interfacial sealing area therebetween, said latter pairof sealing strips having portions thereof projecting laterally beyondthe confines of the associated beams and, in combination with eachother, defining a keyway-forming pattern by means of which successiveconcrete pourings are keyed to each other, the combination furtherincluding a flat sheet-like water seal projecting into said secondinterfacial sealing area and effectively retained in position by thepressure of the sealing strips of said second pair of adjacent sealingstrips on opposite sides thereof, said water seal having a portionthereof projecting outwardly from said sealing area for embedment in afirst concrete pour.
 6. In a concrete form, the combination set forth inclaim 2 and wherein said steel members are in the form of structuralchannels having side flanges which straddle the opposed edges of theadjacent beams.